To communicate with Americans, we must first have confidence. Good body posture can also enhance your self-confidence. You are confident that others are willing to communicate with you. It's best to smile more and keep a kind smile on friends and strangers. Especially when walking on the road, you can smile back when others smile at you. It makes you feel good, doesn't it? Secondly, when facing them, it would be better if you can keep your enthusiasm.